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      Tendency and seasonality of suicide in Chihuahua, México. A retrospective analysis from 2008 to 2018 Translated title: Tendencia y estacionalidad del suicidio en el Estado de Chihuahua, México. Un análisis retrospectivo de 2008-2018

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          Abstract

          Abstract Introduction Suicide has shown an international and national trend to increase, mainly in young people, together with seasonal behavior associated with high temperatures. Although Chihuahua saw the highest number of suicides and suicide attempts in 2016, there are no studies documenting their seasonal and trend behavior. Objective This study sought to analyze the trend and seasonality of completed suicides in the state of Chihuahua from 2008 to 2018. Method The number of deaths from intentionally self-inflicted injuries was obtained from INEGI. The absolute suicide rate was estimated, and a time series model applied to identify its trend and seasonality. In addition, environmental temperature was used as a predictor variable for the number of suicides through a Poisson model. Results A trend was found in the completed suicide rate from 2008 to 2018 in men and women, both separately and together (stationary R2 .73, .66 and .69, respectively), together with seasonality in both sexes (p < .002), with the highest figures being recorded in June and July. An increase of 1,028 suicides was found for every 1°C rise in temperature. In the 10-24 and 25-34 age groups, a linear increase in the suicide rate was observed during the period studied (R² > .7, p = .001). Discussion and conclusion Between 2008 and 2018, the suicide rate increased in the state of Chihuahua, mainly among those aged between 10 and 34. Moreover, suicide rates tend to increase during the months of June and July because of temperature.

          Translated abstract

          Resumen Introducción El suicidio ha presentado una tendencia a la alta a nivel internacional y nacional, principalmente en jóvenes, y un comportamiento estacional, asociado a altas temperaturas. Aunque Chihuahua presentó la mayor cantidad de suicidios e intentos de suicidio durante 2016; no hay estudios que evidencien su comportamiento tendencial y estacional. Objetivo El objetivo fue analizar la tendencia y estacionalidad de suicidios consumados en el estado de Chihuahua de 2008 a 2018. Método Se obtuvieron las defunciones por lesiones autoinfligidas intencionalmente del repositorio del INEGI. Se estimó la tasa de suicidio absoluta y se aplicó un modelo de series de tiempo para identificar su tendencia y estacionalidad; además, se utilizó la temperatura ambiental como variable predictora en el número de suicidios por medio de un modelo Poisson. Resultados Se encontró una tendencia en la tasa de suicidios consumados de 2008 a 2018 en hombres, mujeres y en conjunto (R2 estacionaria .73, .66 y .69, respectivamente); y estacionalidad en ambos sexos (p < .002), donde los mayores registros fueron en junio y julio. Se encontró una asociación en un incremento de 1,028 suicidios por cada incremento de 1°C de la temperatura. En los grupos etarios de 10-24 y 25-34 se observó un incremento lineal en la tasa de suicidio durante el periodo estudiado (R2 > .7, p = .001). Discusión y conclusión De 2008 a 2018, la tasa de suicidios se ha incrementado en el estado de Chihuahua, principalmente entre los 10 y 34 años de edad. Además, la tasa de suicidio tiende a incrementarse durante los meses de junio y julio, asociándose a la temperatura.

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          Most cited references32

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          Climate change and human health: present and future risks.

          There is near unanimous scientific consensus that greenhouse gas emissions generated by human activity will change Earth's climate. The recent (globally averaged) warming by 0.5 degrees C is partly attributable to such anthropogenic emissions. Climate change will affect human health in many ways-mostly adversely. Here, we summarise the epidemiological evidence of how climate variations and trends affect various health outcomes. We assess the little evidence there is that recent global warming has already affected some health outcomes. We review the published estimates of future health effects of climate change over coming decades. Research so far has mostly focused on thermal stress, extreme weather events, and infectious diseases, with some attention to estimates of future regional food yields and hunger prevalence. An emerging broader approach addresses a wider spectrum of health risks due to the social, demographic, and economic disruptions of climate change. Evidence and anticipation of adverse health effects will strengthen the case for pre-emptive policies, and will also guide priorities for planned adaptive strategies.
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            Epidemiology of Suicide and the Psychiatric Perspective

            Suicide is a worldwide phenomenon. This review is based on a literature search of the World Health Organization (WHO) databases and PubMed. According to the WHO, in 2015, about 800,000 suicides were documented worldwide, and globally 78% of all completed suicides occur in low- and middle-income countries. Overall, suicides account for 1.4% of premature deaths worldwide. Differences arise between regions and countries with respect to the age, gender, and socioeconomic status of the individual and the respective country, method of suicide, and access to health care. During the second and third decades of life, suicide is the second leading cause of death. Completed suicides are three times more common in males than females; for suicide attempts, an inverse ratio can be found. Suicide attempts are up to 30 times more common compared to suicides; they are however important predictors of repeated attempts as well as completed suicides. Overall, suicide rates vary among the sexes and across lifetimes, whereas methods differ according to countries. The most commonly used methods are hanging, self-poisoning with pesticides, and use of firearms. The majority of suicides worldwide are related to psychiatric diseases. Among those, depression, substance use, and psychosis constitute the most relevant risk factors, but also anxiety, personality-, eating- and trauma-related disorders as well as organic mental disorders significantly add to unnatural causes of death compared to the general population. Overall, the matter at hand is relatively complex and a significant amount of underreporting is likely to be present. Nevertheless, suicides can, at least partially, be prevented by restricting access to means of suicide, by training primary care physicians and health workers to identify people at risk as well as to assess and manage respective crises, provide adequate follow-up care and address the way this is reported by the media. Suicidality represents a major societal and health care problem; it thus should be given a high priority in many realms.
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              Higher temperatures increase suicide rates in the United States and Mexico

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                Author and article information

                Journal
                sm
                Salud mental
                Salud Ment
                Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz (México, DF, Mexico )
                0185-3325
                April 2021
                : 44
                : 2
                : 43-52
                Affiliations
                [1] Chihuahua Chihuahua orgnameInstituto Chihuahuense de Salud Mental Mexico
                Article
                S0185-33252021000200043 S0185-3325(21)04400200043
                10.17711/sm.0185-3325.2021.008
                dbb3af71-db30-451e-b1dc-aa9b6a23820d

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 25 August 2020
                : 21 February 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 32, Pages: 10
                Product

                SciELO Mexico

                Categories
                Original articles

                epidemiology,suicide,Mental health,epidemiología,series de tiempo,suicidio,Salud mental,time series

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